Pros/cons of powering from 4.2V buck or 3.3V LDOhttps://devzone.nordicsemi.com/f/nordic-q-a/99787/pros-cons-of-powering-from-4-2v-buck-or-3-3v-ldoEDIT: I have a li-ion charger ic (buck converter with built-in power path, auto-selecting buck/battery) giving 3.7-4.2V, which then powers a 3.3 LDO. When the product is connected to 12V, the output will be buck regulated (with noise, etc.), but whenen-USTelligent Community 13Tue, 16 May 2023 11:53:39 GMTRE: Pros/cons of powering from 4.2V buck or 3.3V LDOhttps://devzone.nordicsemi.com/thread/425843?ContentTypeID=1Tue, 16 May 2023 11:53:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f42f3f2f-e07d-4ffc-9c50-c3c2aed88e1cketiljo<p>You can power both the nRF52840 and the nRF9160 from the buck converter. But you might need additional filtering depending on the power supply noise from the buck. There are internal regulators in both the nRF52840 and the nRF9160 so some of the ripple will be taken care of. Try to keep the ripple below 100 mVpp.&nbsp;</p> <p>REG0 the the nRF52840 will take care of the efficiency by itself by changing mode when needed. You need to the set the voltage though, but nothing more.&nbsp;</p><div style="clear:both;"></div>